Manage payment terms from Shopify

The sale is always confirmed when the Shopify order has payment terms.

Closes #14619

modules/web_shop_shopify/CHANGELOG

@@ -1,3 +1,4 @@
+* Manage payment terms
 
 Version 7.8.0 - 2025-12-15
 --------------------------

modules/web_shop_shopify/doc/usage.rst

@@ -26,6 +26,8 @@ with, as a minimum, the :guilabel:`Admin API access scopes`:
 
    * :guilabel:`Orders`: ``write_orders``
 
+   * :guilabel:`Payment terms`: ``read_payment_terms``
+
    * :guilabel:`Product listings`: ``write_product_listings``
 
    * :guilabel:`Products`: ``write_products``

modules/web_shop_shopify/sale.py

@@ -153,6 +153,9 @@ class Sale(IdentifierMixin, metaclass=PoolMeta):
     shopify_tax_adjustment = Monetary(
         "Shopify Tax Adjustment",
         currency='currency', digits='currency', readonly=True)
+    shopify_amount_to_pay = Monetary(
+        "Shopify Amount to Pay",
+        currency='currency', digits='currency', readonly=True)
     shopify_status_url = fields.Char("Shopify Status URL", readonly=True)
     shopify_resource = 'orders'
 
@@ -267,6 +270,9 @@ class Sale(IdentifierMixin, metaclass=PoolMeta):
                     'endCursor': None,
                     }
                 },
+            'paymentTerms': {
+                'paymentTermsType': None,
+                },
             'transactions': Payment.shopify_fields(),
             'totalPriceSet': {
                 'presentmentMoney': {
@@ -488,8 +494,23 @@ class Sale(IdentifierMixin, metaclass=PoolMeta):
             line.quantity = 0
             lines.append(line)
         sale.lines = lines
+        setattr_changed(
+            sale, 'shopify_amount_to_pay',
+            cls._shopify_amount_to_pay(order))
         return sale
 
+    @classmethod
+    def _shopify_amount_to_pay(cls, order):
+        if order['paymentTerms']:
+            return 0
+
+    @property
+    def amount_to_pay(self):
+        amount = super().amount_to_pay
+        if self.shopify_amount_to_pay is not None:
+            amount = self.shopify_amount_to_pay
+        return amount
+
     @property
     def invoice_grouping_method(self):
         method = super().invoice_grouping_method